One day Sebastian wakes up to find a little grey raincloud floating above his head. Afraid of getting wet, he carries a big umbrella everywhere he goes. Sure, the umbrella keeps him safe and dry (and ensures he never has to share a seat on the school bus) but it also makes it hard for him to play games, meet new friends and watch his favourite show. Where did the raincloud come from? And, more importantly, will it ever go away?